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-rw-r--r--test/Transforms/InstCombine/vec_shuffle.ll12
1 files changed, 6 insertions, 6 deletions
diff --git a/test/Transforms/InstCombine/vec_shuffle.ll b/test/Transforms/InstCombine/vec_shuffle.ll
index 37d4d56..37c19f1 100644
--- a/test/Transforms/InstCombine/vec_shuffle.ll
+++ b/test/Transforms/InstCombine/vec_shuffle.ll
@@ -86,14 +86,14 @@ define <4 x i8> @test9(<16 x i8> %tmp6) nounwind {
}
; Same as test9, but make sure that "undef" mask values are not confused with
-; mask values of 2*N, where N is the mask length. These shuffles should not
-; be folded (because [8,9,4,8] may not be a mask supported by the target).
-define <4 x i8> @test9a(<16 x i8> %tmp6) nounwind {
+; mask values of 2*N, where N is the mask length of the result. Make sure when
+; folding these shuffles that 'undef' mask values stay that way in the result
+; instead of getting mapped to the 2*N'th entry of the source.
+define <4 x i8> @test9a(<16 x i8> %in, <16 x i8> %in2) nounwind {
; CHECK: @test9a
-; CHECK-NEXT: shufflevector
-; CHECK-NEXT: shufflevector
+; CHECK-NEXT: shufflevector <16 x i8> %in, <16 x i8> %in2, <4 x i32> <i32 16, i32 9, i32 4, i32 undef>
; CHECK-NEXT: ret
- %tmp7 = shufflevector <16 x i8> %tmp6, <16 x i8> undef, <4 x i32> < i32 undef, i32 9, i32 4, i32 8 > ; <<4 x i8>> [#uses=1]
+ %tmp7 = shufflevector <16 x i8> %in, <16 x i8> %in2, <4 x i32> < i32 undef, i32 9, i32 4, i32 16 > ; <<4 x i8>> [#uses=1]
%tmp9 = shufflevector <4 x i8> %tmp7, <4 x i8> undef, <4 x i32> < i32 3, i32 1, i32 2, i32 0 > ; <<4 x i8>> [#uses=1]
ret <4 x i8> %tmp9
}